Lack of Reproduction in Muskoxen and
Arctic Hares Caused by Early Winter?
Acknowledgements
This work was supported by the National Geographic Society, the U.S. Fish and Wildlife Service, the Biological Resources Division of the U.S. Geological Survey, and the U.S. Department of Agriculture, North Central Forest Experiment Station. The logistical support of the Polar Continental Shelf Project (PCSP) and Atmospheric Environment Services of Environment Canada is also gratefully acknowledged. I wish to thank Ann Gunn, Dennis Murray, and an anonymous reviewer for their helpful suggestions for improving this article. This is PCSP paper 00499.
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